Add IPC performance counter for Linux

Makefile.am

@@ -39,10 +39,12 @@ EnvScreen.h InfoScreen.h XAlloc.h
 if HTOP_LINUX
 htop_CFLAGS += -rdynamic 
 myhtopplatsources = linux/Platform.c linux/IOPriorityPanel.c linux/IOPriority.c \
-linux/LinuxProcess.c linux/LinuxProcessList.c linux/LinuxCRT.c linux/Battery.c
+linux/LinuxProcess.c linux/LinuxProcessList.c linux/LinuxCRT.c linux/Battery.c \
+linux/PerfCounter.c
 
 myhtopplatheaders = linux/Platform.h linux/IOPriorityPanel.h linux/IOPriority.h \
-linux/LinuxProcess.h linux/LinuxProcessList.h linux/LinuxCRT.h linux/Battery.h
+linux/LinuxProcess.h linux/LinuxProcessList.h linux/LinuxCRT.h linux/Battery.h \
+linux/PerfCounter.h
 endif
 
 if HTOP_FREEBSD

configure.ac

@@ -273,8 +273,10 @@ then
 fi
 
 AC_ARG_ENABLE(perfcounters, [AS_HELP_STRING([--enable-perfcounters], [enable hardware performance counters])],, enable_perfcounters="yes")
-if test "x$enable_perfcounters_$my_htop_platform" = xyes_linux
+if test "x$enable_perfcounters" = "xyes" -a "$my_htop_platform" = "linux"
 then
+   AC_DEFINE(HAVE_PERFCOUNTERS, 1, [Define if hardware performance counter support should be enabled.])
+
    AC_CHECK_HEADERS([linux/perf_counter.h], [have_perf_counter=yes],
                                             [have_perf_counter=no])
    

linux/LinuxProcess.c

@@ -18,11 +18,14 @@ in the source distribution for its full text.
 
 /*{
 
+#include "PerfCounter.h"
+
 #define PROCESS_FLAG_LINUX_IOPRIO   0x0100
 #define PROCESS_FLAG_LINUX_OPENVZ   0x0200
 #define PROCESS_FLAG_LINUX_VSERVER  0x0400
 #define PROCESS_FLAG_LINUX_CGROUP   0x0800
 #define PROCESS_FLAG_LINUX_OOM      0x1000
+#define PROCESS_FLAG_LINUX_HPC      0x2000
 
 typedef enum UnsupportedProcessFields {
    FLAGS = 9,
@@ -86,7 +89,10 @@ typedef enum LinuxProcessFields {
    PERCENT_IO_DELAY = 117,
    PERCENT_SWAP_DELAY = 118,
    #endif
-   LAST_PROCESSFIELD = 119,
+   #ifdef HAVE_PERFCOUNTERS
+   IPC = 119,
+   #endif
+   LAST_PROCESSFIELD = 120,
 } LinuxProcessField;
 
 #include "IOPriority.h"
@@ -139,6 +145,11 @@ typedef struct LinuxProcess_ {
    float blkio_delay_percent;
    float swapin_delay_percent;
    #endif
+   #ifdef HAVE_PERFCOUNTERS
+   PerfCounter* cycleCounter;
+   PerfCounter* insnCounter;
+   double ipc;
+   #endif
 } LinuxProcess;
 
 #ifndef Process_isKernelThread
@@ -233,6 +244,9 @@ ProcessFieldData Process_fields[] = {
    [PERCENT_CPU_DELAY] = { .name = "PERCENT_CPU_DELAY", .title = "CPUD% ", .description = "CPU delay %", .flags = 0, },
    [PERCENT_IO_DELAY] = { .name = "PERCENT_IO_DELAY", .title = "IOD% ", .description = "Block I/O delay %", .flags = 0, },
    [PERCENT_SWAP_DELAY] = { .name = "PERCENT_SWAP_DELAY", .title = "SWAPD% ", .description = "Swapin delay %", .flags = 0, },
+#endif
+#ifdef HAVE_PERFCOUNTERS
+   [IPC] = { .name = "IPC", .title = "  IPC ", .description = "Executed instructions per cycle", .flags = PROCESS_FLAG_LINUX_HPC, },
 #endif
    [LAST_PROCESSFIELD] = { .name = "*** report bug! ***", .title = NULL, .description = NULL, .flags = 0, },
 };
@@ -273,6 +287,10 @@ void Process_delete(Object* cast) {
    Process_done((Process*)cast);
 #ifdef HAVE_CGROUP
    free(this->cgroup);
+#endif
+#ifdef HAVE_PERFCOUNTERS
+   PerfCounter_delete(this->cycleCounter);
+   PerfCounter_delete(this->insnCounter);
 #endif
    free(this->ttyDevice);
    free(this);
@@ -394,6 +412,16 @@ void LinuxProcess_writeField(Process* this, RichString* str, ProcessField field)
    case PERCENT_IO_DELAY: LinuxProcess_printDelay(lp->blkio_delay_percent, buffer, n); break;
    case PERCENT_SWAP_DELAY: LinuxProcess_printDelay(lp->swapin_delay_percent, buffer, n); break;
    #endif
+   #ifdef HAVE_PERFCOUNTERS
+   case IPC: {
+      if (lp->ipc == -1) {
+         attr = CRT_colors[PROCESS_SHADOW];
+         xSnprintf(buffer, n, "  N/A "); break;
+      } else {
+         xSnprintf(buffer, n, "%5.2f ", lp->ipc); break;
+      }
+   }
+   #endif
    default:
       Process_writeField((Process*)this, str, field);
       return;
@@ -463,6 +491,10 @@ long LinuxProcess_compare(const void* v1, const void* v2) {
    case PERCENT_SWAP_DELAY:
       return (p2->swapin_delay_percent > p1->swapin_delay_percent ? 1 : -1);
    #endif
+   #ifdef HAVE_PERFCOUNTERS
+   case IPC:
+      return (p2->ipc > p1->ipc ? 1 : -1);
+   #endif
    case IO_PRIORITY:
       return LinuxProcess_effectiveIOPriority(p1) - LinuxProcess_effectiveIOPriority(p2);
    default:

linux/LinuxProcess.h

@@ -10,11 +10,14 @@ in the source distribution for its full text.
 */
 
 
+#include "PerfCounter.h"
+
 #define PROCESS_FLAG_LINUX_IOPRIO   0x0100
 #define PROCESS_FLAG_LINUX_OPENVZ   0x0200
 #define PROCESS_FLAG_LINUX_VSERVER  0x0400
 #define PROCESS_FLAG_LINUX_CGROUP   0x0800
 #define PROCESS_FLAG_LINUX_OOM      0x1000
+#define PROCESS_FLAG_LINUX_HPC      0x2000
 
 typedef enum UnsupportedProcessFields {
    FLAGS = 9,
@@ -78,7 +81,10 @@ typedef enum LinuxProcessFields {
    PERCENT_IO_DELAY = 117,
    PERCENT_SWAP_DELAY = 118,
    #endif
-   LAST_PROCESSFIELD = 119,
+   #ifdef HAVE_PERFCOUNTERS
+   IPC = 119,
+   #endif
+   LAST_PROCESSFIELD = 120,
 } LinuxProcessField;
 
 #include "IOPriority.h"
@@ -131,6 +137,11 @@ typedef struct LinuxProcess_ {
    float blkio_delay_percent;
    float swapin_delay_percent;
    #endif
+   #ifdef HAVE_PERFCOUNTERS
+   PerfCounter* cycleCounter;
+   PerfCounter* insnCounter;
+   double ipc;
+   #endif
 } LinuxProcess;
 
 #ifndef Process_isKernelThread

linux/LinuxProcessList.c

@@ -666,6 +666,32 @@ static void LinuxProcessList_readDelayAcctData(LinuxProcessList* this, LinuxProc
 
 #endif
 
+#ifdef HAVE_PERFCOUNTERS
+
+static void LinuxProcessList_readPerfCounters(LinuxProcess* lp) {
+   if (!lp->cycleCounter) {
+      lp->cycleCounter = PerfCounter_new(lp->super.pid, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES);
+   }
+   if (!lp->insnCounter) {
+      lp->insnCounter = PerfCounter_new(lp->super.pid, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS);
+   }
+   bool cOk = PerfCounter_read(lp->cycleCounter);
+   bool iOk = PerfCounter_read(lp->insnCounter);
+   if (cOk && iOk) {
+      uint64_t i = PerfCounter_delta(lp->insnCounter);
+      uint64_t c = PerfCounter_delta(lp->cycleCounter);
+      if (c > 0) {
+         lp->ipc = (double)i / c;
+      } else {
+         lp->ipc = 0;
+      }
+   } else {
+      lp->ipc = -1;
+   }
+}
+
+#endif
+
 static void setCommand(Process* process, const char* command, int len) {
    if (process->comm && process->commLen >= len) {
       strncpy(process->comm, command, len + 1);
@@ -877,6 +903,11 @@ static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, const char*
       if (ss->flags & PROCESS_FLAG_LINUX_OOM)
          LinuxProcessList_readOomData(lp, dirname, name);
 
+      #ifdef HAVE_PERFCOUNTERS
+      if (ss->flags & PROCESS_FLAG_LINUX_HPC)
+         LinuxProcessList_readPerfCounters(lp);
+      #endif
+
       if (proc->state == 'Z' && (proc->basenameOffset == 0)) {
          proc->basenameOffset = -1;
          setCommand(proc, command, commLen);

linux/LinuxProcessList.h

@@ -121,6 +121,10 @@ void ProcessList_delete(ProcessList* pl);
 
 #endif
 
+#ifdef HAVE_PERFCOUNTERS
+
+#endif
+
 void ProcessList_goThroughEntries(ProcessList* super);
 
 #endif